I use a combination of different programs. It's simpler for me to make it this way. I also use Blender for some things, because it was the program I restarted my first steps with 3D now.
Before this I have also made some first attempts to create models for the FS98 back those days using GMax, but those weren't very successful. They really looked more like flying potatoes
I'm still not able to make models from scratch and I think I will be never able to do so. All I can do is to make some adjustments to existing models, because that isn't so complex.